The Principal Solar Institute Module Ratings

The Principal Solar Institute’s scientifically designed and certified combination of tests and performance standards provide an unbiased, comprehensive rating system – the PSI PV module rating. Seven essential characteristics related to initial and long-term PV module performance are combined to create the PSI Rating:

• Actual Tested Maximum Power vs. Advertised
• Temperature Coefficient at Maximum Power
• Power at Low Irradiance to Power at High Irradiance Ratio
• Normal Operating Cell Temperature (NOCT)
• Total Area Efficiency
• Negative Power Tolerance
• Annual Power Reduction

These ratings allow you to make comparisons when analyzing PV modules and help you select the optimal PV module.

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PSI Ratings – PV Solar Modules from Bosch Solar Energy

Here are the PSI Ratings for modules from Bosch Solar Energy, calculated based on initial performance test data. If you don’t see a solar module that you are considering, contact us and we will try to add it.

Rank	Manufacturer	Model	Type	Power (W DC)	PSI Rating	Percentile
1	Bosch Solar Energy	c-Si M60 NA 44117 270Wp	Monocrystalline	270	8.38*	88
2	Bosch Solar Energy	c-Si M60 NA 44117 265Wp	Monocrystalline	265	8.22*	84
3	Bosch Solar Energy	c-Si M60 NA42117 255W	Monocrystalline	255	8.16*	82
4	Bosch Solar Energy	c-Si M 60-240-16	Monocrystalline	240	8.12*	80
5	Bosch Solar Energy	c-Si M60 NA30119-255Wp	Monocrystalline	255	8.08*	79
6	Bosch Solar Energy	c-Si M60 NA 44117 260Wp	Monocrystalline	260	8.07*	78
7	Bosch Solar Energy	c-Si M60 NA42117 250W	Monocrystalline	250	8.00*	76
8	Bosch Solar Energy	c-Si M 60-235-16	Monocrystalline	235	7.94*	73
9	Bosch Solar Energy	c-Si M60 NA42117 245W	Monocrystalline	245	7.84*	67
10	Bosch Solar Energy	c-Si M 72 NA41126 305Wp	Monocrystalline	305	7.82*	66
11	Bosch Solar Energy	c-Si M 60 NA30117 245W	Monocrystalline	245	7.79*	65
12	Bosch Solar Energy	c-Si M 60-230-16	Monocrystalline	230	7.78*	64
13	Bosch Solar Energy	c-Si M 72 NA41126 300Wp	Monocrystalline	300	7.68*	59
14	Bosch Solar Energy	c-Si M 60 NA30117 240W	Monocrystalline	240	7.67*	58
15	Bosch Solar Energy	c-Si M 60-225-16	Monocrystalline	225	7.61*	54
16	Bosch Solar Energy	c-Si P 72 NA22126 295Wp	Polycrystalline	295	7.57*	52
17	Bosch Solar Energy	c-Si P 72 NA21126 295Wp	Polycrystalline	295	7.57*	52
18	Bosch Solar Energy	c-Si M 72 NA41126 295Wp	Monocrystalline	295	7.57*	52
19	Bosch Solar Energy	c-Si M 60 NA30117 235W	Monocrystalline	235	7.55*	51
20	Bosch Solar Energy	c-Si M60 NA30119-250Wp	Monocrystalline	250	7.47*	46
21	Bosch Solar Energy	c-Si P 72 NA22126 290Wp	Polycrystalline	290	7.42*	43
22	Bosch Solar Energy	c-Si M 72 NA41126 290Wp	Monocrystalline	290	7.42*	43
23	Bosch Solar Energy	c-Si P 72 NA21126 290Wp	Polycrystalline	290	7.42*	43
24	Bosch Solar Energy	c-Si M 60 NA30117 230W	Monocrystalline	230	7.41*	42
25	Bosch Solar Energy	c-Si M60 NA30119-245Wp	Monocrystalline	245	7.33*	38
26	Bosch Solar Energy	c-Si P 72 NA22126 285Wp	Polycrystalline	285	7.31*	36
27	Bosch Solar Energy	c-Si P 72 NA21126 285Wp	Polycrystalline	285	7.31*	36
28	Bosch Solar Energy	c-Si M60 NA30119-240Wp	Monocrystalline	240	7.18*	29
29	Bosch Solar Energy	c-Si P 72 NA21126 280Wp	Polycrystalline	280	7.17*	29
30	Bosch Solar Energy	c-Si P 72 NA22126 280Wp	Polycrystalline	280	7.17*	29
31	Bosch Solar Energy	c-Si P 72 NA22126 275Wp	Polycrystalline	275	7.05*	23
32	Bosch Solar Energy	c-Si P 72 NA21126 275Wp	Polycrystalline	275	7.05*	23

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* Modules denoted with an “*” use estimated values for one or more characteristics. Manufacturers can contact us to provide the missing data for these PV modules.

NOTE: PSI Ratings are based on publicly available data, and are subject to change as additional data and proprietary analyses become available for long-term performance.